Draft-regulating device for locomotive-engines.



J. TROTTER.

DRAFT REGULATING DEVICE FOR LOGOMOTIVE ENGINES. APPLICATION FILED MAY 1, 1914.

1,1 1 1,77 Patented Sept. 29, 1914.

7m: Non/e15 IEFAR: c0 PHOYO Lunu WASHINGTON, n r

UNITED, sTATEs PATENT OFFICE.

JAMES TROT'IER, OF CHICAGO, ILLINOIS;

DRAFT-REGULATING DEVICE FOR LOCOMOTIVE-ENG-IN E S.

Specification of Letters Patent.

Patented Sept. 29, 1914.

Application filed May 1, 1914. 7 Serial No. 835,603.

.in draft regulating devices for locomotive engines, andone of the obj ectsof the same I is to provide an improved device 'of this character having means whereby thediam eter orsiz'eof the exhaust nozzle may be increased or decreased to vary the back" pressure in the exhaust'pipeand the steam v passages, from the cylinder to the atmo s- .phere, whereby the effect of theexhau st 1n creating the forced draft may be ElfBCllIVGlY;

controlled from the cab of theengine.

To the attainment of these ends, and the accomplisment of other new and useful objects, as will appear, the invention conslsts in the features of ,novelty in substantially the construction, combination and arrangement of the several parts, hereinafter more fully described and claimed,'-and shown in the accompanying drawing illustrating the invent1on, and in which .7

-Figure 1 1s a vert cal transverse sectional view of the smoke box ofa locomotive en gine, having a draft regulating device applied thereto, constructed in accordance -with the principles of this invention. Fig. 35

2 isa detail perspective view of one of the out offs or slides. Fig. 3 is an enlarged verticalqsectional view of the exhaust noz zles. Fig. 4 is ahorizontal sectional view taken on line 4:4:, Fig. 1. 1

Referring more particularly to the draw I ing, the numeral 10 designates generally the smoke box ofan engine, having the lines 11 discharging thereinto and the stack 12 leading therefrom. A

Arranged at a low elevation in the smoke box. and directly in line with the stack 12 is an exhaust nozzle/comprising a support or base 13 and a nozzle proper 14. The

- nozzleproper is shaped toform two'op- 'posed chambers'15 projecting laterally be- ;yond the nozzle and having communication ,ivith the interior thereof. These chambers are arranged some distance from the tip of the nozzle and mounted to slide in the chambers are cut offs or slides 16 which are: arranged opposed to. each other and are tion 29, 30 with the bar. preferably extends through the top of the of a size to fit loosely in the chambers and to be moved toward and other in the directions toward and away "from the center of the nozzle, and into and out of the respective chambers 15, and

yet are adapted to be arrested short of each other 1n. their movements in directions to ward each other These slides are provided with depending portions 17 to which are connected bars or rods 18, 19 that extend through suitable bearings 20, 21 in the away from each walls of the respective chambers 15 and these bars 18, 19 yond the walls.

. Connected with the bar 18 is a transverse project some distance bebar or rod 22 which is of a length so that the extremities will extend beyond both sides of the bar 18 and connected with these extremities are links 23 which extend in a direction toward the bar 19 and disposed between and connected'with the bar 19 and the extremiwhich preferably have a pinand slot connection 25, 26 with the bar 19, and are fulcrumed as at 24:. With this construction it ties of the respective bars 23 are links 24, p I

will be manifest that when the bar 19 is.

or cut ofl connected therewith, toward or away from the other slide or cut off, both of the slides will be simultaneously moved and moved in its bearings 21, to move the slide the pin and slot connection will permit of,

such movement.

In order to vary or regulate the size of the steam column, and thereby control the draft on the fire bed as well as control the efiect of the exhaust or backpressure in the pipe and steam passages, all that is necessary is to adjust the slides or out ofi's 16 so as to increase or decrease the opening in the nozzle. This is accomplished by adjusting the bar 19, in any suitable manner, preferably from the cab in the engine by means of a rock shaft 27 arranged vertically and connected-with the bar 19 through the medium of a link 28, having a pin andslot connecsmoke box and has connected therewith an arm 31, and this arm 31 has connected with it any suitable mechanism arranged within and operable from the cab of the engine, by means of which the shaft 27 may be rocked and the slides or cut offs 16 adjusted. I 7 It will be notedthat the steam coming from the exhaust will impinge the lower faces of the cut offs or slides 16, which has a This shaft 27 passages so that the steam entering the chambers 15, will pass through the passages,; across the faces of the cutoffs to keep such faces clean and thereby prevent the accu- 5 mulation and corrosion of foreign particles, 7 which accumulation would seriously interfere with the operation of the cutoffs.

In order to readily ascertain the degree of pressure in the nozzle or pipe, a suitable:

g pressure gage, (not shown), may be provided in a convenlent posltlon m the cab of the engine, and this pressure gage is connected with thenozzle by means of a suit-- able connection or pipe 33 leading from and:

jcoinniunicating with the nozzle.

Obviously many changes may be made in the details of construction and in the com-; bination and arrangement of the several, parts without departing from the spirit of v this invention.

What is claimed as new is zj 1. In a variable exhaust for engines, an exhaust nozzle, opposed cut offs movable transversely of the nozzle toward and away i'ifr0m the center of the nozzle, chambers formed in the nozzle for receiving the respective cut ofis, and spaced bearings disposed between the upper face of the cut olfs and the upper wall of the respective cham [wjgber's to reduce friction therebetween and to form a passageway for the steam across the upper face of the cut ofi's.

2; In a variable exhaust for engines, an exhaust nozzle, opposed laterally opening gw tchambers having communication with the nozzle, a cutoff embodying separated members, one of which members is arranged to move loosely in each of the chambers whereby the steam will pass through the chambers aojand around the cutoffs, and both members movable in directions toward and from the center of the nozzle, a journal connected with each of the members, each of the journals having a bearing in one of the walls of I each of the chambers and extending through that wall to the outside of the chamber, and means exterior of the chambers and nozzle connecting the said members for movement in unison.

0 3; In a variable exhaust for engines, an exhaust nozzle, opposed. laterally opening chambers having communication with the nozzle, a cutofi' embodying separated mem bers, one ofwhich members is arranged to move in each of the chambers, and both means for actuating the members from the members movable in directions toward and i from the center ofthe nozzle, a journal connected with each of the members, each of the journals having a bearing in one of the walls of each of the chambers and extending through that wall to the outside ofthe chamber, spaced ribs connected with the cutoffs and extending-lengthwise cf the direction of the movement of the cutoffs, said ribs forming a passage for the steam from the chamber and acrossthe face of the cutoff, means exterior of the chambers and nozzle connecting the said members for movementin unison, and

cab of the engine. 0

4-. In a variable exhaust for engines, an exhaust nozzle, opposed laterally opening chambers having communication with the nozzle, a cutoff embodying separated mend-"1,; bars, cne bf which members is arrangedto move in each of the chambers, and both members movable in directions toward and from the center of thenozz'le, a journal connected witheach of the members, each of the journals having abearing in one of the '90 walls of each of the chambers and extending through that wall to the outside of the chainber, spaced ribs on the upper face of each of the said members, said ribs extending lengthwise of the direction of the movement of the members and contacting with and movable over the top wall of the respective chambers to form a passage for-the steam through the chambers and across the face of 1 the cutofl, and means exterior of the (sham bers and nozzle connecting the membersfor movement ih'ilIilSOn. I

v 5. A variable exhaust for engines embodying an exhaust nozzle, opposed laterally L extending chambers opening into'the nozzle, a cutofi' member in each chamber said me'mhere being separated from each otherfand movable toward and away from each other, means supporting the members from the end walls of the respective chambers and for sliding movementfin the chambers, means holding the members spaced from the wall of the chamber to form a passage for the steam through the chamber and across the i face of the member and means exterior of the nozzle and chambers for simultaneously and correspondingly actuating the members.

6. A variable exhaust for engines, embodying an exhaust nozzle, opposed laterally 1 extending chambers opening into the nozzle, acutoff member in each chamber, said members being separated from each other and movable towardand away from each other, means supporting the members from the end walls of the respective chambers and for j sliding movement in the chambers, means exterior of the nozzle and chambers for simultaneously and correspondingly actuating the members, and spaced ribs projecting above the upper face of each of the mem- 'members movable in directions toward and from the center of the nozzle, a journal connected with each of the members, each of the journals having a bearing in one of the walls of each of the chambers and extending through that wall to the outside of the chambers, means exterior of the chambers and nozzle connectlng the sad members for movement in unison, and a gage connected with the nozzle for indicating the degree of pressure in the nozzle by the cutofl's.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, on this 28th day of April A. D. 1914.

JAMES rnorTER;

the adjustment of Witnesses V FRANK N. REED," J. H. J opH'nM, Jr.

Copies of this patent may be obtained for five cents each, by addressing the commissioner of Patents,

Washington, D. 0. 

